1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * PTP 1588 clock support - sysfs interface.
13 			       struct device_attribute *attr, char *page)  in clock_name_show()  argument
16 	return sysfs_emit(page, "%s\n", ptp->info->name);  in clock_name_show()
20 #define PTP_SHOW_INT(name, var)						\  argument
22 			   struct device_attribute *attr, char *page)	\
25 	return snprintf(page, PAGE_SIZE-1, "%d\n", ptp->info->var);	\
27 static DEVICE_ATTR(name, 0444, var##_show, NULL);
37 				  struct device_attribute *attr,  in extts_enable_store()  argument
41 	struct ptp_clock_info *ops = ptp->info;  in extts_enable_store()
43 	int cnt, enable;  in extts_enable_store()  local
44 	int err = -EINVAL;  in extts_enable_store()
46 	cnt = sscanf(buf, "%u %d", &req.extts.index, &enable);  in extts_enable_store()
47 	if (cnt != 2)  in extts_enable_store()
49 	if (req.extts.index >= ops->n_ext_ts)  in extts_enable_store()
52 	err = ops->enable(ops, &req, enable ? 1 : 0);  in extts_enable_store()
63 			       struct device_attribute *attr, char *page)  in extts_fifo_show()  argument
66 	struct timestamp_event_queue *queue = &ptp->tsevq;  in extts_fifo_show()
70 	int cnt = 0;  in extts_fifo_show()  local
74 	if (mutex_lock_interruptible(&ptp->tsevq_mux))  in extts_fifo_show()
75 		return -ERESTARTSYS;  in extts_fifo_show()
77 	spin_lock_irqsave(&queue->lock, flags);  in extts_fifo_show()
80 		event = queue->buf[queue->head];  in extts_fifo_show()
82 		WRITE_ONCE(queue->head, (queue->head + 1) % PTP_MAX_TIMESTAMPS);  in extts_fifo_show()
84 	spin_unlock_irqrestore(&queue->lock, flags);  in extts_fifo_show()
89 	cnt = snprintf(page, PAGE_SIZE, "%u %lld %u\n",  in extts_fifo_show()
92 	mutex_unlock(&ptp->tsevq_mux);  in extts_fifo_show()
93 	return cnt;  in extts_fifo_show()
98 			    struct device_attribute *attr,  in period_store()  argument
102 	struct ptp_clock_info *ops = ptp->info;  in period_store()
104 	int cnt, enable, err = -EINVAL;  in period_store()  local
106 	cnt = sscanf(buf, "%u %lld %u %lld %u", &req.perout.index,  in period_store()
109 	if (cnt != 5)  in period_store()
111 	if (req.perout.index >= ops->n_per_out)  in period_store()
115 	err = ops->enable(ops, &req, enable);  in period_store()
126 				struct device_attribute *attr,  in pps_enable_store()  argument
130 	struct ptp_clock_info *ops = ptp->info;  in pps_enable_store()
132 	int cnt, enable;  in pps_enable_store()  local
133 	int err = -EINVAL;  in pps_enable_store()
136 		return -EPERM;  in pps_enable_store()
138 	cnt = sscanf(buf, "%d", &enable);  in pps_enable_store()
139 	if (cnt != 1)  in pps_enable_store()
142 	err = ops->enable(ops, &req, enable ? 1 : 0);  in pps_enable_store()
153 	&dev_attr_clock_name.attr,
155 	&dev_attr_max_adjustment.attr,
156 	&dev_attr_n_alarms.attr,
157 	&dev_attr_n_external_timestamps.attr,
158 	&dev_attr_n_periodic_outputs.attr,
159 	&dev_attr_n_programmable_pins.attr,
160 	&dev_attr_pps_available.attr,
162 	&dev_attr_extts_enable.attr,
163 	&dev_attr_fifo.attr,
164 	&dev_attr_period.attr,
165 	&dev_attr_pps_enable.attr,
170 					struct attribute *attr, int n)  in ptp_is_attribute_visible()  argument
174 	struct ptp_clock_info *info = ptp->info;  in ptp_is_attribute_visible()
175 	umode_t mode = attr->mode;  in ptp_is_attribute_visible()
177 	if (attr == &dev_attr_extts_enable.attr ||  in ptp_is_attribute_visible()
178 	    attr == &dev_attr_fifo.attr) {  in ptp_is_attribute_visible()
179 		if (!info->n_ext_ts)  in ptp_is_attribute_visible()
181 	} else if (attr == &dev_attr_period.attr) {  in ptp_is_attribute_visible()
182 		if (!info->n_per_out)  in ptp_is_attribute_visible()
184 	} else if (attr == &dev_attr_pps_enable.attr) {  in ptp_is_attribute_visible()
185 		if (!info->pps)  in ptp_is_attribute_visible()
202 static int ptp_pin_name2index(struct ptp_clock *ptp, const char *name)  in ptp_pin_name2index()  argument
205 	for (i = 0; i < ptp->info->n_pins; i++) {  in ptp_pin_name2index()
206 		if (!strcmp(ptp->info->pin_config[i].name, name))  in ptp_pin_name2index()
209 	return -1;  in ptp_pin_name2index()
212 static ssize_t ptp_pin_show(struct device *dev, struct device_attribute *attr,  in ptp_pin_show()  argument
219 	index = ptp_pin_name2index(ptp, attr->attr.name);  in ptp_pin_show()
221 		return -EINVAL;  in ptp_pin_show()
223 	if (mutex_lock_interruptible(&ptp->pincfg_mux))  in ptp_pin_show()
224 		return -ERESTARTSYS;  in ptp_pin_show()
226 	func = ptp->info->pin_config[index].func;  in ptp_pin_show()
227 	chan = ptp->info->pin_config[index].chan;  in ptp_pin_show()
229 	mutex_unlock(&ptp->pincfg_mux);  in ptp_pin_show()
234 static ssize_t ptp_pin_store(struct device *dev, struct device_attribute *attr,  in ptp_pin_store()  argument
239 	int cnt, err, index;  in ptp_pin_store()  local
241 	cnt = sscanf(buf, "%u %u", &func, &chan);  in ptp_pin_store()
242 	if (cnt != 2)  in ptp_pin_store()
243 		return -EINVAL;  in ptp_pin_store()
245 	index = ptp_pin_name2index(ptp, attr->attr.name);  in ptp_pin_store()
247 		return -EINVAL;  in ptp_pin_store()
249 	if (mutex_lock_interruptible(&ptp->pincfg_mux))  in ptp_pin_store()
250 		return -ERESTARTSYS;  in ptp_pin_store()
252 	mutex_unlock(&ptp->pincfg_mux);  in ptp_pin_store()
261 	struct ptp_clock_info *info = ptp->info;  in ptp_populate_pin_groups()
262 	int err = -ENOMEM, i, n_pins = info->n_pins;  in ptp_populate_pin_groups()
267 	ptp->pin_dev_attr = kcalloc(n_pins, sizeof(*ptp->pin_dev_attr),  in ptp_populate_pin_groups()
269 	if (!ptp->pin_dev_attr)  in ptp_populate_pin_groups()
272 	ptp->pin_attr = kcalloc(1 + n_pins, sizeof(*ptp->pin_attr), GFP_KERNEL);  in ptp_populate_pin_groups()
273 	if (!ptp->pin_attr)  in ptp_populate_pin_groups()
277 		struct device_attribute *da = &ptp->pin_dev_attr[i];  in ptp_populate_pin_groups()
278 		sysfs_attr_init(&da->attr);  in ptp_populate_pin_groups()
279 		da->attr.name = info->pin_config[i].name;  in ptp_populate_pin_groups()
280 		da->attr.mode = 0644;  in ptp_populate_pin_groups()
281 		da->show = ptp_pin_show;  in ptp_populate_pin_groups()
282 		da->store = ptp_pin_store;  in ptp_populate_pin_groups()
283 		ptp->pin_attr[i] = &da->attr;  in ptp_populate_pin_groups()
286 	ptp->pin_attr_group.name = "pins";  in ptp_populate_pin_groups()
287 	ptp->pin_attr_group.attrs = ptp->pin_attr;  in ptp_populate_pin_groups()
289 	ptp->pin_attr_groups[0] = &ptp->pin_attr_group;  in ptp_populate_pin_groups()
294 	kfree(ptp->pin_dev_attr);  in ptp_populate_pin_groups()
301 	kfree(ptp->pin_attr);  in ptp_cleanup_pin_groups()
302 	kfree(ptp->pin_dev_attr);  in ptp_cleanup_pin_groups()